Grounding detection device

The invention relates to a grounding detection device which is used for carrying out grounding status detection on the devices which have grounding requirements and are to be detected. The grounding detection device consists of a power supply, a current limit resistor, an auxiliary detection line, a trigger, an alarm unit, a signal driving unit and an alternating current contactor. The grounding detection device has the beneficial effect of giving continuous sound-light alarms to prompt the users and ensure the product safety and the personal safety when the function modules for grounding detection have ground wire breakage or bad contact.